• Electronics and Telecommunications Trends
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• v.12 no.1 s.43
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• pp.51-61
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• 1997

최근 미국을 비롯한 세계 각국에서는, 경쟁 환경이 도입된 통신 시장에서 가입자들이 자신의 전화 번호를 그대로 유지하면서 타 사업자에게 이동할 수 있는 번호 이동성(Number Portability)제공이 커다란 이슈로 등장하고 있다. 본 고에서는 번호 이동성의 유형을 살펴보고, 특히 문제가 되는 시내 전화시장의 경쟁에 따른 LNP(Local Number Portability)에 대하여 그 실현 방법들을 조사 분석하였다. 미국에서의 연구 동향을 바탕으로 교환기 기반의 단기 해결 방안과 지능망을 이용한 장기적 해결 방안을 소개하고, 구체적인 호 처리 흐름을 예시하였다.

• Journal of Korean Institute of Industrial Engineers
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• v.32 no.2
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• pp.120-125
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• 2006

Since Korean government has implemented the "Number Portability System" in the domestic mobile communications market, mobile communication companies have been striving to hold onto existing customers and at the same time to attract new customers. This paper presents a competing risk model that considers the characteristics of a customer in order to predict the customer's life under the "Number Portability System." Three competing risks considered are pricing policy, quality of communication, and usefulness of service. It was observed that the customers who pay more are less sensitive on pricing policy younger people are less sensitive than older people to the quality of communication and women are more sensitive than men to the degree of usefulness of service. We expect that the result of this study can be used as a guideline for effective management of mobile phone customers under the Number Portability System.

• ETRI Journal
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• v.32 no.1
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• pp.169-171
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• 2010

Even though Internet phone service (IPS) continues to evolve in terms of quality and competitive pricing compared with the public switched telephone network (PSTN), the number of Internet phone subscribers is still low in South Korea. The Korean government decided to apply number portability to the IPS market in 2008. This study expresses its value in monetary terms with a contingent valuation approach. With this methodology, this study investigates the willingness of 316 current PSTN subscribers to pay for IPS, using a specific survey method called double-bounded dichotomous choices, to obtain more accurate data. The results show that the calculated value of Internet phone number portability positively impacts consumer welfare.

• 한국경영정보학회:학술대회논문집
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• 2007.11a
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• pp.453-459
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• 2007

The mobile telecommunication sector is increasingly gathering way becoming a key area for the economic development in Uzbekistan. One way to promote competition among providers is the introduction of a number portability service. This paper estimates subscriber's willingness to pay (WTP) for the MNP service in the mobile communication market in Uzbekistan. Consumer valuation was estimated using a conjoint analysis. Since number portability had not been introduced at the time of the study, stated preference data from the conjoint survey was used. Results indicate that currently subscribers do not attach a lot of importance to the MNP service, while price and service quality are most valuable components. The results of this study provide important implication for mobile network operators and policy developers on potential MNP implementation.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.81-85
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• 2004

This study analyzes strategy and main contents between each business market by mobile phone Number Portability. And, grasps what each mobile company customer satisfaction factors is effected on mobile phone Number Portability and estimates relative importance about the factors and understand counter strategies by these factors. Concretely, this paper searched the important quality factor by frequency analysis, factor analysis, regression analysis and path analysis etc. And The sample data is subscriber using mobile communication service of the existing mobile communication company (SKT, KTF, LGT)

• The Journal of Engineering Research
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• v.3 no.1
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• pp.79-84
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• 1998

This paper studies application protocol for local number portability(LNP) between SSP(Service Switching Point) and SCP(Service Control Point) when users switching from one telecommunication carrier to another in local area. Here, this paper considers that LNP uses CS-1 standard of IN(Intelligent Nework). So, this paper will propose application protocol for LNP when used IN.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.6
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• pp.631-636
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• 2010

The network configuration of SMS number moving service is a very important factor to improve the user convenience to Internet Telephone. To provide the service, The SMSC system is required the the function of DB process and management of the subscriber, In case of SMSG system to interconnects with the other network and SMSC, the function of the call processing of subscriber who has changed his number by interconnecting with NPDB(Number Portability DB) is required. This paper had studied the way to consist the efficient network by the number moving technique.

• Journal of Distribution Science
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• v.15 no.12
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• pp.53-60
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• 2017

Purpose - This paper analyzes the effect of the handset subsidy and the Mobile Number Portability subscriber subsidy regulation, which are the main regulation adopted in "Law on the Improvement of the Mobile Terminal Distribution System" (Mobile Terminal Distribution Act), on the social surplus, the consumer surplus and profits of telecommunications carriers. We focus our analysis on whether the service charge competition is stimulated enough so that it can compensate for the loss of subsidies. Research design, data, and methodology - We use simple economic model to assess the impact of the handset subsidy and the Mobile Number Portability subscriber subsidy regulation. Unlike the former researches on this topic, we depart from using Hotelling model, and instead use the switching cost model, which uses switching cost as a parameter of market powers of telecommunications carriers. We also study the effect of the two different regulations when they are adopted both independently and concurrently. Results - If the market powers of telecommunications carriers are over certain threshold, contrary to the regulatory agency's assertion, the service charge competition would not be stimulated enough to compensate for the deduction in the subsidies, and thus the consumer surplus is compromised. Number Portability subsidy, especially, undermines the rival's market power and thus reduces the service charge. On the other hand, the regulations will also increase the profits of telecommunications carriers. However, social surplus is maximized when both of the regulations are present because the regulations reduces the frequency of switching handsets inefficiently. Conclusions - In enacting the Mobile Terminal Distribution Act, the telecommunications regulatory agency asserted that the regulation on subsidies will stimulate service charge competition, and in the long run, enhance the consumer surplus. However, contrary to the regulatory agency's assertion, subsidy regulation, especially the regulation on Number Portability subsidy, reduces consumer surplus. On the other hand, the Mobile Terminal Distribution Act can also increase the profits of telecommunications carriers because it decreases competition among the telecommunications carriers. However, the Mobile Terminal Distribution Act can increase the social surplus because it reduces inefficient switching of handsets.

• Journal of KIISE:Computing Practices and Letters
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• v.6 no.2
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• pp.225-233
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• 2000

Local Number Portability (LNP), an Intelligent Network (IN) service, provides the ability to retain existing telephone numbers when switching from one telecommunications carrier to another, from one region to another, or from one service to another. Local Number Portability (LNP), an Intelligent Network (IN) service, provides the ability to retain existing telephone numbers when switching from one telecommunications carrier to another, from one region to another, or from one service to another. LNP is a key service for increasing competition in the local telephone marketplace. Many countries are now establishing detailed rules for ensuring competition between network operators. Because many major carriers will deploy their own LNP databases, a single access point must be provided to effectively manage and distribute updates to the common regional LNP database. This is called Number Portability Administration Center (NPAC). Recently, CORBA is being accepted as one of the key technologies for developing distributed application systems. To use CORBA for managing IN services, several standard organizations are working towards the integration of IN, TMN and CORBA. In this paper, we present our work on applying the TMN and CORBA technology for the service management of LNP. We first propose a CORBA-based LNP service management system architecture, We then present the design and implementation of a LNP service management system using CORBA.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.355-358
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• 2002

The network functional standard for MNP defines tile network functional structure and information flow to provide Number portability among the imt-2000 mobile phone. In this paper we define network function and system function and processing method of information which will be changed among them. In this paper, we also defines the processing method of SMS.